Centering-device for pipe-working tools.



I. W. NONNEMAN.

CENTERING DEVICE FOR PIPE WORKING TOOLS.

APPLICATION FILED APRML 19H. 7

Patented Nov; 19, 1918.

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'KFm; 144mm Aims.

M 1 OFFICE IRA' W. NoNNEMnmfor omo, xsszenon'ro THE BORDEN COMPANY, or wnrmnn omo,n-oonronnrron or OHIO.

' "GENTERING1EVICE FOR"PIPE-WORKING"TO'OIGS.

a emaemumersrraent *PatentedNov. 19,1918,

Original application filed Januar 8,;19i75sm1no. 141,122, iDivided -and this applicationfiled Apri1 4, a i. 1917. 7 Seria1No.,-159,643.

T 1 w fimawaw m: L I i,

it k o vthat I .W- r-NQ NEM N, e

1 citizen of the United States, residing at Warren gin the conntygof Trumbull and State of Ohio, have; invented I a certain .new

and useful Improvement in Centering {Devices for Pipe-Working Tools, of which the following is ainll, clear, and exact deseription, referenoe-being had'to the accompanying drawings. a I r a p I My pr app o fi o- 1414 25 fi d January 8, 1917,3f0r a die stoek,,of which a this is a division, shows a die stock of the receding chasertype, wherein there is a romy c ryingi ram s e e dap d to surround the pipe and be clamped to it, and suitable connecting: inechanisnl between the rotary frame and the sleeve: controlling the recedence of the chaser as' therotary frame approaches the sleeve. The present mvention is concerned with the mechanism for vclamping the stationary' sleeve to the pipe. While this mechanisrn is shown-in In the drawings, Figure 1 is a axial see 7 of a re eding lie oekwq nped w rnycentering device Fig, anfendeleva- .ti of s c di .st jkiate mp ng d;

ig- 33 s a a agm ntary s ct l; nrr P ra ith Fi 2,;a 1 te ywh viee vfor locking oneaof the-centeringplnngers being a cross section on. thelme 4 .'.4;of

F g- 2; Flgi' -m agmen Wr s s onthe line 5+5of .Fig l,:illnstratingthe traveling threaded rider controlling the re- ,cedence of the thread-cutting chaser of the embodimentshown. fI D -Fig. 1, 10 indicates a sultablerotary Mira-me; carrying radial thread-cutting chasers ljl, jSorne suitable means, as for example projecting handles ,(notshown) 1s adapted "V toflrotate the frame. The'chasers are pro,-

; ,yided' at their. inner ends nwith teetho 12 for cutting tapered threads-sand as the cutting sr egri s hey re d --1 11d r h on of a I Fig. 1, 'A indicates a pipe bout tote threaded. Around thispip'eisplaced ai's'tatlonaryesleeve 20 which isllarnped tof'the pipe, This sleeveris shownas having an external thread 21' ofthe'same taper and pitch asthe thread which is to'be cutonzthe pipe. Engaging the thread '21 are suitable arcual internally threaded riders 30 which are connected withthe chasers. 'Theconnection, shown consists ofllevers' 32jpivoted at their centers 33 to ears 'rig'id withthe chaser frame, these levers extending forwardly of theirpivots through openings. in

the chaser frame and bearing against shoulders onthe chasers. Asthe chaser-carryiing frame travels toward the stationary sleene, the taperojof-ithe thread 21 allows the riderstoapproach the axis which allows the ehasers to correspondingly recede'fromthe axis. 35 indicates suitable spring pressed detents preventing'the 'chas'ers' dropping inardly out of the frame when the die stock isnot in use. i 1

S0 :rnuch of the tool. asabove described is not concerned specifically with'the-present invention and in ay accordingly be "changed, as desired. The presentinv'ention, however, does operate eifectively with the ,mechanism above I described to clamp the'sleeve 200n the pipe,, and it .rperformsl another function of holding :a v suit ed riders 3Q.

The lsleeVeJQO is shown. asfihaving'f anex- 'tension .22 wli'ichlis icylindricalion 'its" fexterior and is separated, :from the threaded portion 21. by a radiaITfiangeQBQ Surr unding the extensioni22" is iazslee've 40 which has an inward flange 41 overhanging the .fi mge 23 and has long itlidinal slots 42in which operate the bifurcated heads '31 o'f' the threaded riders 30, thisYsleeve serving to protect the thread 21 from v, chips, etc. The sleeve 40 rotates on the-stationary 'sleeve20 and is held against longitudinal shifting" thereon by the flange.23,greferred to, and a collar 50 .snrroundiirg" the extension 22. In

the. embodiment shown, m centering device performs the double purpose of, e'fi'ectively but removably holding the collar'on the" sleeveQQand at the: same time centering the stockion the pipe A; I I

Carried radiallyhy 'thefcolla'r 50 and'e'xn ng th o the er selfles -fi s.

25 I these shoulders is adaptedfto be engaged 60, two being shown-in Fig. 2,: one hundred and twenty degrees apart. At a polnt one hundred and twenty degrees fromeach 0t these plungers is shown a set screw 62, screwing radially through the collar and the stationary sleeve. These three; members are adapted to clamp the pipe, center the die stack. and l bQ. I Q-. B Y Q .:-theretQ-.1 As these members extend through both the collar and the sleeve '20 they necessarily lock the protecting sleeve 40 of the die stock.

As pipes have certain/standard sizes, I

2 makethe plilngers'GOz adjustable by definite steps, according to such sizes, and use the set screw 62 to positively tighten the clamp gen the pipe. Figs. 2 and 3 illustrate'a pipe A, which may betaken as the smallest-size with which the particular clamp shown is adapted to be used. The pipe Am Fig: 1 may be considered the largest size, and wetmay'suppose that there are two intermediate: sizes. To enable adjustments'for such four s1zes, I

' form four shoulders 65 .in the'cylindrical surface of the plungers 60. Any one of bya'lockin g plunger 66, h' avinga nose 67 and contained in a'housing 53 carried by their-outer ends, as shown at 63, whereby they may be conveniently turned'about'their axes. When so turned the locking plunger 66 is thereby cammed backwardly, and the plunger 60 may be moved inwardly or outwardly by hand. The nOtches 65' 'are'arranged in steppedrelation, so that when the plunger, 60 isturned slightly and'inoved axially the nose 67 of the locking plunger will come into the next notch 65. By positioning these notches 65 at different portions of the cylindrical surface of the plunger 60 Y and arranging their shoulders at proper distanc'es from the inner ends of the plungers, they. maybe readily changed by a simple finger operation'from one. size'of pipe to another.

It will be seen that my centering device'is very simple-in construction and readily operates to change the tool from one size of pipe to another. The centering is automatic and it is not necessary to resort to calipering or to use any special gage. The construction I provides a self-contained centeringdevice much simpler than a series of 'interchangeable bushings,

which have heretofore been used. m

the combination'of my centering-device with a die-stock, as itfwill be'readily seen thatit is adapted for various pipe working tools.

directly cooperates. the collar to the sleeve, and tl'llS- positions' However, my. centering, device has the additional advantage, When embodied in a die stock. of the, character shown, of holding the protecting sleeve in place. 'Accordingly, the claims appended hereto are intended to cover'the centering 'device both independently of the die stock and in conjunction with the stationary and rotary sleeves of a die stock-with which the centering device Having thus described my invention, What I claim is:

1. In a device of the character described, the combination "with an annular holder, of a plunger radially mounted in the holder and movable thereinfboth rotatively and longitudinally and 'havinga set of notches positioned at different distances from its end and in" effect relation, and a detent plunger having a nose adapted'to engage I anyof said notches and lock the first mentioned plunger in position.

- 2. a: device of the character described,

the combination 'with a ring, of fa movable positioning plunger mounted therein and rotatable and 'shii'tablelongitudinally and having a set of notches-positioned at difi'erent dista'nces from its end and-in ofiset relatlon' toeach other, a detent'plunger having a nose' adaptedto engage any ofsaidnotches and lock the positioning plunger in position, a spring pressing the detentplunger toward the centering plunger, and means carried by the ring'adaptedto' center a pipe; against sa d plungenij 1 y 3. Ina device' of the character described, the combination with a'holder, of a plunger mounted'in 'the'holder for r'otative and axial m'ovementtherein, said, plunger having notches formed in it at different distances 1 05 from its end and-in stepped relation, and a detent deviceadapted to engage any ofsaid notches. W r

' 4'. In-adevice of the character described,

thecombinationvvith a holder, of a'centering plunger mounted in the holder for rotative and axial movement therein, "said" plunger. havingznotches formed in it at different distances fromits end and in stepped relation, a detent device adapted to engage any; of said notches, a spring for pressing sa1d' detentdevice toward the plunger,'the detent devicebeing adapted to becammed back'to' free the plunger'byreason of a'rotative'movem'ent in the plunger. 5. In a devlce of the character described,

the combination 'of a'holder, a cylindrical plunger mounted therein and adapted to -move both 'rotatively and longitudinally, the outer end of the plunger having a p w p r I knurled portion whereby it may be readily I do not intend to limit myself herein to fturn ed, a' Ii 0f n0tches'i11'theby1indfice1' lwall ofthefplunger positioned at different distances from "its inner endandin offset relation, a lateral locking plunger havinga' nose adapted to engage any of said notches, and a spring forcing the lateral plunger toward the plunger first mentioned.

6. In a device of the character described, the combination of a ring, a radial plunger extending through the ring and adapted to bear against a pipe located coaxially with the ring, said plunger having notches formed at different distances from its inner end, a lateral plunger having a nose adapted to engage any of said notches or be forced outwardly by the turning of the radial plunger, and a spring pressing the lateral plunger toward active position.

7. In a device of the character described, the combination with a holding ring, of a plurality of radial plungers each having a set of notches positioned at different distances from its end, and means adapted to engage any of said notches and lock the centering plungers in position.

8. In a device of the character described, the combination with a ring, radial plungers mounted therein and each having a set of notches positioned at different distances from its end, detent plungers carried by the ring and each having a nose adapted to engage any of said notches and lock the corresponding centering plunger in position, and springs pressing the detent plungers toward the centering plungers.

9. In a centering device, the combination of a ring adapted to surround the work to be centered, a plurality of centering plun gers mounted in the ring for rotative and axial movement therein, each plunger having notches formed in it at different distances from its end and in stepped relation, and detent devices carried by the ring for engaging any of said notches.

10. In a device of the character described,

the combination of a ring adapted to surround a pipe, a pair of individually movable radial plungers carried by the ring, individual means for locking said plungers in various definite positions, and a screw carried by the ring and adapted to engage the )1 e. 1 II. In a device of the character described, the combination of a ring, a pair of radial plungers mounted therein substantially one hundred twenty degrees apart, said plungers being movable radially independently of each other, means for locking them in various definite positions dependent upon various sizes of pipes, and a radial screw located substantially one hundred twenty degrees from each plunger and adapted to bear against a pipe and clamp the device tightly to it.

12. The combination of a ring, a pair of cylindrical radial plungers mounted therein at substantially one hundred twenty degrees apart, each plunger having a set of notches in its cylindrical surface, a pair of detent plungers carried by the ring and pressed against the radial plungers, and a clamping member carried by the ring substantially one hundred twenty degrees from each plunger.

In testimony whereof, I hereunto aflix my signature.

IRA W. NONNEMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner'of Patents,

Washington, D. G. 

